CVE-2020-2156: 
Java vulnerability analysis and mitigation

Jenkins DeployHub Plugin version 8.0.14 and earlier contains a security vulnerability (CVE-2020-2156) discovered and disclosed on March 9, 2020. The vulnerability affects the credential handling functionality in the plugin, where credentials stored in job config.xml files are transmitted in plain text during configuration form transmission, despite being encrypted on disk (Jenkins Advisory, OSS Security).

The vulnerability stems from the plugin's credential handling mechanism where credentials, although stored in an encrypted format on disk in job config.xml files, are transmitted unencrypted as plain text during configuration form transmission. This implementation flaw has a CVSS severity rating of Low, indicating limited potential impact (Jenkins Advisory).

The vulnerability could result in exposure of credentials to users with Extended Read permission on the Jenkins system. The exposure could occur through various vectors including browser extensions and cross-site scripting vulnerabilities (Jenkins Advisory).

As of the advisory publication on March 9, 2020, no fix was available for this vulnerability in the DeployHub Plugin. Users should assess their risk and consider implementing additional access controls to limit Extended Read permissions (Jenkins Advisory).

The vulnerability was discovered and reported by James Holderness of IB Boost, demonstrating ongoing security research in the Jenkins plugin ecosystem. The Jenkins project publicly acknowledged this contribution in their security advisory (Jenkins Advisory).